periodic
Happening at intervals
Periodic means recurring at regular intervals.
A periodic checkup happens on a fixed schedule.
Periodic table arranges elements by recurring patterns in their properties.
The word can also describe something that happens occasionally but not on a strict schedule: periodic outbursts of violence.
Periodically is the adverb: The machine needs to be serviced periodically.
Occurring at irregular intervals
- sporadicOccurring irregularly, infrequently
- occasionalHappening at intervals
- regularOccurring at fixed intervals
- cyclicalRepeating in rounds
seasonal · annual · monthly · weekly · daily · hourly · quarterly · biweekly
Patterned stress and silence
- intervalsGaps between events
- phasesDistinct periods in sequence
- rotationTurning on an axis
- revolutionsTurnovers of power
oscillation · fluctuation · ebb and flow · waxing and waning · tides · seasons · circadian · lunar
Purpose or duty
- sineOpposite over hypotenuse
- cosineRatio in triangle math
- tangentLine touching curve once
- waveOscillating motion through medium
trigonometric · harmonic · series · sequence · repeating decimal · modular · domain · graph
Arranged list of events
- routineRegular sequence of actions
- calendarDate-tracking system
- deadlineTime limit for completion
- appointmentScheduled time for something
checkpoint · review · audit · inspection · maintenance · publication · newsletter · journal
intermittent
Occurring at irregular intervals
- sporadicOccurring irregularly, infrequently
- occasionalHappening at intervals
- regularOccurring at fixed intervals
cyclical · seasonal · annual · monthly · weekly · daily · hourly · quarterly · biweekly · fortnightly
rhythm
Patterned stress and silence
revolutions · oscillation · fluctuation · ebb and flow · waxing and waning · tides · seasons · circadian · lunar · menstrual
function
Purpose or duty
wave · trigonometric · harmonic · series · sequence · repeating decimal · modular · domain · graph · oscillating
timetable
Arranged list of events
appointment · checkpoint · review · audit · inspection · maintenance · publication · newsletter · journal · magazine
element
Basic substance or factor
- tableHorizontal furniture surface
- MendeleevChemist who systematized elements
- atomicOf elemental particles
electron · valence · group · row · noble gases · alkali · halogen · metalloid · isotope · atomic number
- time wordsminute, hour, day, now, soon
- frequenciesdaily, weekly, monthly, yearly, annually
- intermittentintermittent, sporadic, on-off, discontinuous, occasional
- sequencessequence, arithmetic, series, geometric, progressions
- habit wordsdaily, regular, routine, habitual, chronic
- acousticssound waves, sound wave, sound, soundwave, vibration
periodicirregular
Deviating from normal patterns
nonperiodic · erratic · sporadic · random · haphazard
periodiccontinuous
Without pause or gap
constant · continual · uninterrupted · incessant · unceasing
periodicpermanent
Fixed without end
eternal · everlasting · lasting · interminable · perpetual
- grace periodAllowed delay before consequences
- periodic tableSystematic display of elements
- trial periodTemporary testing interval
- waiting periodRequired delay before proceeding
- honeymoon periodInitial uncritical enthusiasm stage
- time periodBounded stretch of duration
period, periods, periodic sentence, periodically, periodical, periodicity, periodic table